Zweifel, Thomas D.
Selectbooks, 2009
Buku Teks
Ward, Kate
McGraw-Hill, 2012
Buku Referensi
Raines, Claire
American Management Association, 2006
eBooks
Putri Permata Rezeki
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2013
UI - Tesis Membership
Miller, Brian Cole
[American Management Association;, ], 2010
eBooks